Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.86	$ 0.84
Exercise of stock options (in shares)	20,250	29,250
Stock Issued During Period, Shares, Other		61,796
Purchase of treasury shares (in shares)	231,132